28667610 has 96 divisors (see below), whose sum is σ = 81022032. Its totient is φ = 7004160.

The previous prime is 28667609. The next prime is 28667623. The reversal of 28667610 is 1676682.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 14311089 + 14356521 = 3783^2 + 3789^2 .

It is a super-2 number, since 2×28667610² = 1643663726224200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 62502 + ... + 62958.

Almost surely, 2^28667610 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28667610, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40511016).

28667610 is an abundant number, since it is smaller than the sum of its proper divisors (52354422).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28667610 is a wasteful number, since it uses less digits than its factorization.

28667610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528 (or 525 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 28667610 is about 5354.2142280637. The cubic root of 28667610 is about 306.0533675983.

It can be divided in two parts, 286 and 67610, that added together give a triangular number (67896 = T₃₆₈).

The spelling of 28667610 in words is "twenty-eight million, six hundred sixty-seven thousand, six hundred ten".